P3D Re: TDC 116

[roberts@xxxxxxxxxxxxxxxxx (John W Roberts)]

>Date: Tue, 2 Jun 1998 21:28:19 -0600
>From: "Dr. George A. Themelis" <DrT-3d@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
>Subject: P3D Re: TDC 116

>>I remember reading on this wonderful list that 750 watt bulbs aren't any
>>brighter.  The instruction booklet implies that if one uses 750 watt bulbs
>>there won't be a difference, if your regular wiring cannot provide the
>>15 ampere current required to fully illuminate them. 

>Which wiring is that?  Projector or home?  If it is the projector, can
>it be enough resistance in the wires to cause a 250W loss?  

I don't know about those particular bulbs, but in general, brightness of a
bulb is *not* just a function of power consumption. For a given bulb wattage,
a thinner filament should be much brighter, since it will run hotter, and
more of the output will be in the visible range of the EM spectrum.

>From the numbers, I take it that the projector in question uses two bulbs?

John R


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